I just graduated from a University. I was in Mechanical Engineering major. My overall GPA is 3.5. However, I have some problems with my Lower-level division courses. While I was in Freshman and Sophomore years, I had some Ds, Fs and W in some Math and G.E subjects. I did very very well in my Junior and Senior years. Can these grades of D,F be serious barriers to me by the time I go to Top Graduate Universities for my M.S degree or I apply for a job? I think that they look at everything even though Upper Division courses are more important. Is there anyone who have the same experience as me? Thanks.